[PATCH v2 2/4] net/mlx4: support a device removal check operation

[Matan Azrad <matan@mellanox.com>]

Add support to get removal status of mlx4 device.

Signed-off-by: Matan Azrad <matan@mellanox.com>
---
 drivers/net/mlx4/mlx4.c        |  1 +
 drivers/net/mlx4/mlx4.h        |  1 +
 drivers/net/mlx4/mlx4_ethdev.c | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+)

diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index f9e4f9d..3cde640 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -256,6 +256,7 @@ struct mlx4_conf {
 	.filter_ctrl = mlx4_filter_ctrl,
 	.rx_queue_intr_enable = mlx4_rx_intr_enable,
 	.rx_queue_intr_disable = mlx4_rx_intr_disable,
+	.is_removed = mlx4_is_removed,
 };
 
 /**
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index 3aeef87..0eaba89 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -165,6 +165,7 @@ int mlx4_flow_ctrl_get(struct rte_eth_dev *dev,
 int mlx4_flow_ctrl_set(struct rte_eth_dev *dev,
 		       struct rte_eth_fc_conf *fc_conf);
 const uint32_t *mlx4_dev_supported_ptypes_get(struct rte_eth_dev *dev);
+int mlx4_is_removed(struct rte_eth_dev *dev);
 
 /* mlx4_intr.c */
 
diff --git a/drivers/net/mlx4/mlx4_ethdev.c b/drivers/net/mlx4/mlx4_ethdev.c
index 2f69e7d..0d46f5a 100644
--- a/drivers/net/mlx4/mlx4_ethdev.c
+++ b/drivers/net/mlx4/mlx4_ethdev.c
@@ -1060,3 +1060,23 @@ enum rxmode_toggle {
 	}
 	return NULL;
 }
+
+/**
+ * Check if mlx4 device was removed.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   1 when device is removed, otherwise 0.
+ */
+int
+mlx4_is_removed(struct rte_eth_dev *dev)
+{
+	struct ibv_device_attr device_attr;
+	struct priv *priv = dev->data->dev_private;
+
+	if (ibv_query_device(priv->ctx, &device_attr) == EIO)
+		return 1;
+	return 0;
+}
-- 
1.8.3.1